02-04-2024 11:02 PM
I'm currently working on configuring inter-VLAN routing on a Cisco SF302-08 switch. I've already enabled Layer 3 routing, created the VLANs, assigned them to switchports, and configured the switch VLAN interfaces accordingly. However, I'm encountering difficulties at the step where I need to configure a routed port or a static route. Despite attempting these configurations, I'm unable to achieve successful communication between the different VLANs.
The switch's configuration:
show running-config: v1.4.0.88 / R800_NIK_1_4_194_194 CLI v1.0 set system mode router ! vlan database vlan 10,20 exit interface vlan 1 ip address 101.205.25.252 255.255.255.0 no ip address dhcp ! interface vlan 10 ip address 101.205.10.1 255.255.255.0 ! interface vlan 20 ip address 101.205.20.1 255.255.255.0 ! interface fastethernet3 switchport mode access switchport access vlan 10 ! interface fastethernet4 switchport mode access switchport access vlan 20 ! interface fastethernet5 switchport trunk allowed vlan add 10,20 ! interface fastethernet7 switchport mode access switchport access vlan 10 ! interface fastethernet8 switchport mode access switchport access vlan 20 ! exit ip route 101.205.10.0 /24 101.205.25.254
Consequently, I am seeking assistance to resolve this issue. Any guidance or support offered would be greatly appreciated.
02-09-2024 07:59 AM
the router config seems ok,
but do you have fixed IP-address configuration for your clients?
if not where is your DHCP server located ?
-> you need an ip-helper address configured on the vlan's/ SVI's that are not directly connected to the DHCP-server vlan
Cisco Small Business 300 Series Command Line Interface Guide Release 1.2.5/1.2.7
37.14 ip helper-address
02-12-2024 12:01 AM
Thank you for your response.
I've set up static IP addresses for all clients in the network. Although I appreciate your suggestion about using an ip-helper address, I'm curious if it would still be beneficial given that the fixed IP configurations already in place.
02-12-2024 12:53 AM
If DHCP is not used, then ip-helper is not needed / will not improve the routing behavior
02-12-2024 12:59 AM
what unsuccessful communications are you talking about ?
NB! the windows firewall by default only allows incoming trafic from the local subnet
so it will not allow icmp/ping or remote-desktop connections from another subnet
-> you need to modify the windows firewall configuration, (or simply disable temporarily to perform your tests)
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